Alert archive / Illinois / Tornado Warnings in 1998

Tornado Warning 74, NWS Lincoln, IL

May 23, 1998Shelby County, Illinois

NWS Lincoln, IL issued this tornado warning at May 23, 1998, 7:50 PM CDT for Shelby County, Illinois. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 23, 1998, 7:50 PM CDT (00:50 UTC)
Expired: May 23, 1998, 8:45 PM CDT
In force: 55 min
Issued by: NWS Lincoln, IL
Area: Whole counties

County Shelby County, IL

The radar

The Lincoln radar (KILX), 96 km from the middle of the area, began a volume at 00:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 23, 5:30 PM CDT	Tornado Watch	SPC	7 hr
May 23, 7:45 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.8 hours before the alert went out and 86 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 213 J/kg
Mixed-layer CIN: -286 J/kg
Mixed-layer LCL: 533 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSPI 240051 RRA
TORSPI
ILC173-240145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
750 PM CDT SAT MAY 23 1998

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* TORNADO WARNING FOR
  SHELBY COUNTY IN CENTRAL ILLINOIS

* UNTIL 845 PM CDT

* AT 745 PM CDT LINCOLN DOPPLER RADAR INDICATED A POSSIBLE TORNADO 8
  MILES SOUTHWEST OF SHELBYVILLE...MOVING EAST AT 15 MPH.

* THIS STORM IS EXPECTED TO AFFECT AREAS AROUND...
  LAKEWOOD
  COWDEN
  SHELBYVILLE
  STEWARDSON

THE TORNADO MAY BE OBSCURED BY RAIN AND MAY NOT BE VISIBLE. TAKE
COVER IN A BASEMENT OR INTERIOR ROOM ON THE LOWEST FLOOR.

BYRD/AUTEN

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 23, 8:19 PM CDT	Tornado Warning	ILX	Clay	56 min
May 23, 9:12 PM CDT	Tornado Warning	ILX	Clay, Effingham	48 min
May 24, 12:41 AM CDT	Severe Thunderstorm Warning	ILX	Schuyler	49 min
May 24, 1:02 AM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Scott	58 min
May 24, 1:15 AM CDT	Severe Thunderstorm Warning	ILX	Fulton, Mason	60 min
May 24, 1:44 AM CDT	Severe Thunderstorm Warning	ILX	Menard	46 min
May 24, 2:07 AM CDT	Severe Thunderstorm Warning	ILX	Logan, Tazewell	53 min
May 24, 2:13 AM CDT	Severe Thunderstorm Warning	ILX	Shelby	47 min
May 24, 2:35 AM CDT	Severe Thunderstorm Warning	ILX	Piatt	40 min
May 24, 2:38 AM CDT	Severe Thunderstorm Warning	ILX	Moultrie	37 min
May 24, 2:45 AM CDT	Severe Thunderstorm Warning	ILX	DeWitt, McLean	60 min
May 24, 2:58 AM CDT	Severe Thunderstorm Warning	ILX	Coles	62 min
May 24, 3:01 AM CDT	Severe Thunderstorm Warning	ILX	Champaign	59 min
May 24, 3:16 AM CDT	Severe Thunderstorm Warning	ILX	Piatt	29 min

Nearby

Tornado Warnings in Illinois, 1998 Every tornado warning in 1998 Tornadoes in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.